161458020 has 72 divisors (see below), whose sum is σ = 492850176. Its totient is φ = 42783552.

The previous prime is 161458001. The next prime is 161458069. The reversal of 161458020 is 20854161.

161458020 is a `hidden beast` number, since 1 + 61 + 4 + 580 + 20 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26589 + ... + 32091.

Almost surely, 2^161458020 is an apocalyptic number.

161458020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161458020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246425088).

161458020 is an abundant number, since it is smaller than the sum of its proper divisors (331392156).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161458020 is a wasteful number, since it uses less digits than its factorization.

161458020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5681 (or 5676 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 161458020 is about 12706.6132387824. The cubic root of 161458020 is about 544.5275708452.

The spelling of 161458020 in words is "one hundred sixty-one million, four hundred fifty-eight thousand, twenty".